Lesitung Motorsports decided to push the stock K16 turbos further than most and was able to get 553 wheel horsepower which is a gain of over 150 horsepower to all four wheels. This is really not far off some Cayenne Turbos that have been modified with aftermarket turbos. Additionally, this is all done on the stock intercoolers, turbos, internals, and transmission.
Porscheboost has not ever seen a higher stock turbo Cayenne Turbo dynograph posted. It almost feels like one should be skeptical but the graph says what the graph says. Absolutely incredible results with just minor supporting mods including bypass pipes, intake, and likely race gas as well.